questions about terminology || what files can be safely Excluded from a scan

Avast Free Antivirus / Premium Security
1

consider the three attached .png’s.

questions in connection with a Boot Scan:

  • what is meant by “Repair”?
  • if i elect “Move to chest” as the default action then what can i do if avast will not allow me to Restore an error?
  • what can i do if the “Delete” default action turns out to be an error?
  • when would i choose “No Action” as the default ?
  • what is meant by “populate the persistent cache” ?

questions in connection with a Regular Scan {i set my heuristics sensitivity to high, and set my scan priority to high}:

[list]

  • it has been my observation that most of the scan’s time is allocated to only a few files, and that these files have never yet produced infected objects: C:\Program Files … C:\WinDDK … and C:\WINDOWS. therefore, i ask whether it is safe to configure avast to Exclude these files?
  • avast detected three C:\System Volume Information\ … ~.exe files as high threat infecteds. i have assumed that these three are false positives and elected to Do Nothing — do you agree? if these are indeed false positives, then is it safe to configure avast to Exclude C:\System Volume Information\ ?

[li] what are accepted strategies for constructing a Custom Scan?

2
consider the three attached .png's.
what attachments?
what is meant by "Repair"?
[b]Clean, Quarantine, or Delete?[/b] http://antivirus.about.com/b/2007/03/11/clean-quarantine-or-delete.htm
if i elect "Move to chest" as the default action then what can i do if avast will not allow me to Restore an error?
what do you mean by restore an error? if you mean scan errors, avast will not take any action on reported scan errors as they are not infections

high heuristic settings also give you a bigger chanse of false positive detections…
why do you think the files detected is false positives?

3

see the three linked-to .png’s:

[although these three .png’s sum to 446 KB – less than this forum’s stated 512 KB maximum – this forum’s posting mechanism continues to reject it, so perhaps the following image-hosting links will be successful:]

http://i244.photobucket.com/albums/gg20/nweissma/AVAST_Queries_12-19-2012_4_zps394abbef.png

http://i244.photobucket.com/albums/gg20/nweissma/AVAST_Queries_12-19-2012_5_zps89051263.png

http://i244.photobucket.com/albums/gg20/nweissma/AVAST_Queries_12-19-2012_6_zps45603853.png

4
what is meant by "populate the persistent cache" ?
https://blog.avast.com/2010/04/25/how-to-make-the-full-system-scan-6x-faster-in-10-days/